Service on a natural person may be made "by delivering the summons within the state to a person of suitable age and discretion at the actual place of business, dwelling place or usual place of abode of the person to be served and by . . . mailing the summons to the person to be served at his or her last known residence." Jurisdiction is not acquired pursuant to the statute unless there is strict compliance with the two steps of delivery and mailing. The plaintiff bears the ultimate burden of proving by a preponderance of the evidence that jurisdiction over the defendant was obtained by proper service of process.
Aurora Loan Servs, LLC v. Revivo, NY Slip Op 06210 (2d Dep't August 21, 2019)
Here is the decision.